/*
* Asterisk -- An open source telephony toolkit.
*
- * Copyright (C) 1999 - 2008, Digium, Inc.
+ * Copyright (C) 1999 - 2012, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* \arg See also: \ref cdr_odbc
*/
+/*! \li \ref res_odbc.c uses the configuration file \ref res_odbc.conf
+ * \addtogroup configuration_file Configuration Files
+ */
+
+/*!
+ * \page res_odbc.conf res_odbc.conf
+ * \verbinclude res_odbc.conf.sample
+ */
+
/*** MODULEINFO
<depend>generic_odbc</depend>
+ <depend>res_odbc_transaction</depend>
<depend>ltdl</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/app.h"
#include "asterisk/strings.h"
#include "asterisk/threadstorage.h"
-#include "asterisk/data.h"
-
-/*** DOCUMENTATION
- <function name="ODBC" language="en_US">
- <synopsis>
- Controls ODBC transaction properties.
- </synopsis>
- <syntax>
- <parameter name="property" required="true">
- <enumlist>
- <enum name="transaction">
- <para>Gets or sets the active transaction ID. If set, and the transaction ID does not
- exist and a <replaceable>database name</replaceable> is specified as an argument, it will be created.</para>
- </enum>
- <enum name="forcecommit">
- <para>Controls whether a transaction will be automatically committed when the channel
- hangs up. Defaults to false. If a <replaceable>transaction ID</replaceable> is specified in the optional argument,
- the property will be applied to that ID, otherwise to the current active ID.</para>
- </enum>
- <enum name="isolation">
- <para>Controls the data isolation on uncommitted transactions. May be one of the
- following: <literal>read_committed</literal>, <literal>read_uncommitted</literal>,
- <literal>repeatable_read</literal>, or <literal>serializable</literal>. Defaults to the
- database setting in <filename>res_odbc.conf</filename> or <literal>read_committed</literal>
- if not specified. If a <replaceable>transaction ID</replaceable> is specified as an optional argument, it will be
- applied to that ID, otherwise the current active ID.</para>
- </enum>
- </enumlist>
- </parameter>
- <parameter name="argument" required="false" />
- </syntax>
- <description>
- <para>The ODBC() function allows setting several properties to influence how a connected
- database processes transactions.</para>
- </description>
- </function>
- <application name="ODBC_Commit" language="en_US">
- <synopsis>
- Commits a currently open database transaction.
- </synopsis>
- <syntax>
- <parameter name="transaction ID" required="no" />
- </syntax>
- <description>
- <para>Commits the database transaction specified by <replaceable>transaction ID</replaceable>
- or the current active transaction, if not specified.</para>
- </description>
- </application>
- <application name="ODBC_Rollback" language="en_US">
- <synopsis>
- Rollback a currently open database transaction.
- </synopsis>
- <syntax>
- <parameter name="transaction ID" required="no" />
- </syntax>
- <description>
- <para>Rolls back the database transaction specified by <replaceable>transaction ID</replaceable>
- or the current active transaction, if not specified.</para>
- </description>
- </application>
- ***/
struct odbc_class
{
char *password;
char *sanitysql;
SQLHENV env;
- unsigned int haspool:1; /*!< Boolean - TDS databases need this */
unsigned int delme:1; /*!< Purge the class */
unsigned int backslash_is_escape:1; /*!< On this database, the backslash is a native escape sequence */
unsigned int forcecommit:1; /*!< Should uncommitted transactions be auto-committed on handle release? */
unsigned int isolation; /*!< Flags for how the DB should deal with data in other, uncommitted transactions */
- unsigned int limit; /*!< Maximum number of database handles we will allow */
- int count; /*!< Running count of pooled connections */
- unsigned int idlecheck; /*!< Recheck the connection if it is idle for this long (in seconds) */
unsigned int conntimeout; /*!< Maximum time the connection process should take */
+ unsigned int maxconnections; /*!< Maximum number of allowed connections */
/*! When a connection fails, cache that failure for how long? */
struct timeval negative_connection_cache;
/*! When a connection fails, when did that last occur? */
struct timeval last_negative_connect;
- /*! List of handles associated with this class */
- struct ao2_container *obj_container;
+ /*! A pool of available connections */
+ AST_LIST_HEAD_NOLOCK(, odbc_obj) connections;
+ /*! Lock to protect the connections */
+ ast_mutex_t lock;
+ /*! Condition to notify any pending connection requesters */
+ ast_cond_t cond;
+ /*! The total number of current connections */
+ size_t connection_cnt;
};
static struct ao2_container *class_container;
static odbc_status odbc_obj_connect(struct odbc_obj *obj);
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
-static int odbc_register_class(struct odbc_class *class, int connect);
-static void odbc_txn_free(void *data);
-static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx);
+static void odbc_register_class(struct odbc_class *class, int connect);
AST_THREADSTORAGE(errors_buf);
-static struct ast_datastore_info txn_info = {
- .type = "ODBC_Transaction",
- .destroy = odbc_txn_free,
-};
-
struct odbc_txn_frame {
AST_LIST_ENTRY(odbc_txn_frame) list;
struct ast_channel *owner;
char name[0]; /*!< Name of this transaction ID */
};
-#define DATA_EXPORT_ODBC_CLASS(MEMBER) \
- MEMBER(odbc_class, name, AST_DATA_STRING) \
- MEMBER(odbc_class, dsn, AST_DATA_STRING) \
- MEMBER(odbc_class, username, AST_DATA_STRING) \
- MEMBER(odbc_class, password, AST_DATA_PASSWORD) \
- MEMBER(odbc_class, limit, AST_DATA_INTEGER) \
- MEMBER(odbc_class, count, AST_DATA_INTEGER) \
- MEMBER(odbc_class, forcecommit, AST_DATA_BOOLEAN)
-
-AST_DATA_STRUCTURE(odbc_class, DATA_EXPORT_ODBC_CLASS);
-
-static const char *isolation2text(int iso)
+const char *ast_odbc_isolation2text(int iso)
{
if (iso == SQL_TXN_READ_COMMITTED) {
return "read_committed";
}
}
-static int text2isolation(const char *txt)
+int ast_odbc_text2isolation(const char *txt)
{
if (strncasecmp(txt, "read_", 5) == 0) {
if (strncasecmp(txt + 5, "c", 1) == 0) {
}
}
-static struct odbc_txn_frame *find_transaction(struct ast_channel *chan, struct odbc_obj *obj, const char *name, int active)
-{
- struct ast_datastore *txn_store;
- AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
- struct odbc_txn_frame *txn = NULL;
-
- if (!chan && obj && obj->txf && obj->txf->owner) {
- chan = obj->txf->owner;
- } else if (!chan) {
- /* No channel == no transaction */
- return NULL;
- }
-
- ast_channel_lock(chan);
- if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
- oldlist = txn_store->data;
- } else {
- /* Need to create a new datastore */
- if (!(txn_store = ast_datastore_alloc(&txn_info, NULL))) {
- ast_log(LOG_ERROR, "Unable to allocate a new datastore. Cannot create a new transaction.\n");
- ast_channel_unlock(chan);
- return NULL;
- }
-
- if (!(oldlist = ast_calloc(1, sizeof(*oldlist)))) {
- ast_log(LOG_ERROR, "Unable to allocate datastore list head. Cannot create a new transaction.\n");
- ast_datastore_free(txn_store);
- ast_channel_unlock(chan);
- return NULL;
- }
-
- txn_store->data = oldlist;
- AST_LIST_HEAD_INIT(oldlist);
- ast_channel_datastore_add(chan, txn_store);
- }
-
- AST_LIST_LOCK(oldlist);
- ast_channel_unlock(chan);
-
- /* Scanning for an object is *fast*. Scanning for a name is much slower. */
- if (obj != NULL || active == 1) {
- AST_LIST_TRAVERSE(oldlist, txn, list) {
- if (txn->obj == obj || txn->active) {
- AST_LIST_UNLOCK(oldlist);
- return txn;
- }
- }
- }
-
- if (name != NULL) {
- AST_LIST_TRAVERSE(oldlist, txn, list) {
- if (!strcasecmp(txn->name, name)) {
- AST_LIST_UNLOCK(oldlist);
- return txn;
- }
- }
- }
-
- /* Nothing found, create one */
- if (name && obj && (txn = ast_calloc(1, sizeof(*txn) + strlen(name) + 1))) {
- struct odbc_txn_frame *otxn;
-
- strcpy(txn->name, name); /* SAFE */
- txn->obj = obj;
- txn->isolation = obj->parent->isolation;
- txn->forcecommit = obj->parent->forcecommit;
- txn->owner = chan;
- txn->active = 1;
-
- /* On creation, the txn becomes active, and all others inactive */
- AST_LIST_TRAVERSE(oldlist, otxn, list) {
- otxn->active = 0;
- }
- AST_LIST_INSERT_TAIL(oldlist, txn, list);
-
- obj->txf = txn;
- obj->tx = 1;
- }
- AST_LIST_UNLOCK(oldlist);
-
- return txn;
-}
-
-static struct odbc_txn_frame *release_transaction(struct odbc_txn_frame *tx)
-{
- if (!tx) {
- return NULL;
- }
-
- ast_debug(2, "release_transaction(%p) called (tx->obj = %p, tx->obj->txf = %p)\n", tx, tx->obj, tx->obj ? tx->obj->txf : NULL);
-
- /* If we have an owner, disassociate */
- if (tx->owner) {
- struct ast_datastore *txn_store;
- AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
-
- ast_channel_lock(tx->owner);
- if ((txn_store = ast_channel_datastore_find(tx->owner, &txn_info, NULL))) {
- oldlist = txn_store->data;
- AST_LIST_LOCK(oldlist);
- AST_LIST_REMOVE(oldlist, tx, list);
- AST_LIST_UNLOCK(oldlist);
- }
- ast_channel_unlock(tx->owner);
- tx->owner = NULL;
- }
-
- if (tx->obj) {
- /* If we have any uncommitted transactions, they are handled when we release the object */
- struct odbc_obj *obj = tx->obj;
- /* Prevent recursion during destruction */
- tx->obj->txf = NULL;
- tx->obj = NULL;
- odbc_release_obj2(obj, tx);
- }
- ast_free(tx);
- return NULL;
-}
-
-static void odbc_txn_free(void *vdata)
-{
- struct odbc_txn_frame *tx;
- AST_LIST_HEAD(, odbc_txn_frame) *oldlist = vdata;
-
- ast_debug(2, "odbc_txn_free(%p) called\n", vdata);
-
- AST_LIST_LOCK(oldlist);
- while ((tx = AST_LIST_REMOVE_HEAD(oldlist, list))) {
- release_transaction(tx);
- }
- AST_LIST_UNLOCK(oldlist);
- AST_LIST_HEAD_DESTROY(oldlist);
- ast_free(oldlist);
-}
-
-static int mark_transaction_active(struct ast_channel *chan, struct odbc_txn_frame *tx)
-{
- struct ast_datastore *txn_store;
- AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
- struct odbc_txn_frame *active = NULL, *txn;
-
- if (!chan && tx && tx->owner) {
- chan = tx->owner;
- }
-
- ast_channel_lock(chan);
- if (!(txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
- ast_channel_unlock(chan);
- return -1;
- }
-
- oldlist = txn_store->data;
- AST_LIST_LOCK(oldlist);
- AST_LIST_TRAVERSE(oldlist, txn, list) {
- if (txn == tx) {
- txn->active = 1;
- active = txn;
- } else {
- txn->active = 0;
- }
- }
- AST_LIST_UNLOCK(oldlist);
- ast_channel_unlock(chan);
- return active ? 0 : -1;
-}
-
static void odbc_class_destructor(void *data)
{
struct odbc_class *class = data;
+ struct odbc_obj *obj;
+
/* Due to refcounts, we can safely assume that any objects with a reference
* to us will prevent our destruction, so we don't need to worry about them.
*/
if (class->sanitysql) {
ast_free(class->sanitysql);
}
- ao2_ref(class->obj_container, -1);
+
+ while ((obj = AST_LIST_REMOVE_HEAD(&class->connections, list))) {
+ ao2_ref(obj, -1);
+ }
+
SQLFreeHandle(SQL_HANDLE_ENV, class->env);
+ ast_mutex_destroy(&class->lock);
+ ast_cond_destroy(&class->cond);
}
static int null_hash_fn(const void *obj, const int flags)
static void odbc_obj_destructor(void *data)
{
struct odbc_obj *obj = data;
- struct odbc_class *class = obj->parent;
- obj->parent = NULL;
+
odbc_obj_disconnect(obj);
- ast_mutex_destroy(&obj->lock);
- ao2_ref(class, -1);
}
-static void destroy_table_cache(struct odbc_cache_tables *table) {
+static void destroy_table_cache(struct odbc_cache_tables *table)
+{
struct odbc_cache_columns *col;
+
ast_debug(1, "Destroying table cache for %s\n", table->table);
+
AST_RWLIST_WRLOCK(&table->columns);
while ((col = AST_RWLIST_REMOVE_HEAD(&table->columns, list))) {
ast_free(col);
}
AST_RWLIST_UNLOCK(&table->columns);
AST_RWLIST_HEAD_DESTROY(&table->columns);
+
ast_free(table);
}
* \retval A structure describing the table layout, or NULL, if the table is not found or another error occurs.
* When a structure is returned, the contained columns list will be
* rdlock'ed, to ensure that it will be retained in memory.
+ *
+ * XXX This creates a connection and disconnects it. In some situations, the caller of
+ * this function has its own connection and could donate it to this function instead of
+ * needing to create another one.
+ *
+ * XXX The automatic readlock of the columns is awkward. It's done because it's possible for
+ * multiple threads to have references to the table, and the table is not refcounted. Possible
+ * changes here would be
+ * * Eliminate the table cache entirely. The use of ast_odbc_find_table() is generally
+ * questionable. The only real good use right now is from ast_realtime_require_field() in
+ * order to make sure the DB has the expected columns in it. Since that is only used sparingly,
+ * the need to cache tables is questionable. Instead, the table structure can be fetched from
+ * the DB directly each time, resulting in a single owner of the data.
+ * * Make odbc_cache_tables a refcounted object.
+ *
* \since 1.6.1
*/
struct odbc_cache_tables *ast_odbc_find_table(const char *database, const char *tablename)
char columnname[80];
SQLLEN sqlptr;
SQLHSTMT stmt = NULL;
- int res = 0, error = 0, try = 0;
- struct odbc_obj *obj = ast_odbc_request_obj(database, 0);
+ int res = 0, error = 0;
+ struct odbc_obj *obj;
AST_RWLIST_RDLOCK(&odbc_tables);
AST_RWLIST_TRAVERSE(&odbc_tables, tableptr, list) {
if (tableptr) {
AST_RWLIST_RDLOCK(&tableptr->columns);
AST_RWLIST_UNLOCK(&odbc_tables);
- if (obj) {
- ast_odbc_release_obj(obj);
- }
return tableptr;
}
- if (!obj) {
+ if (!(obj = ast_odbc_request_obj(database, 0))) {
ast_log(LOG_WARNING, "Unable to retrieve database handle for table description '%s@%s'\n", tablename, database);
AST_RWLIST_UNLOCK(&odbc_tables);
return NULL;
do {
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- if (try == 0) {
- try = 1;
- ast_odbc_sanity_check(obj);
- continue;
- }
ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", database);
break;
}
res = SQLColumns(stmt, NULL, 0, NULL, 0, (unsigned char *)tablename, SQL_NTS, (unsigned char *)"%", SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- if (try == 0) {
- try = 1;
- SQLFreeHandle(SQL_HANDLE_STMT, stmt);
- ast_odbc_sanity_check(obj);
- continue;
- }
+ SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'.\n", database);
break;
}
entry->octetlen = entry->size;
}
- ast_verb(10, "Found %s column with type %hd with len %ld, octetlen %ld, and numlen (%hd,%hd)\n", entry->name, entry->type, (long) entry->size, (long) entry->octetlen, entry->decimals, entry->radix);
+ ast_debug(3, "Found %s column with type %hd with len %ld, octetlen %ld, and numlen (%hd,%hd)\n", entry->name, entry->type, (long) entry->size, (long) entry->octetlen, entry->decimals, entry->radix);
/* Insert column info into column list */
AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list);
}
destroy_table_cache(tableptr);
tableptr = NULL;
}
- if (obj) {
- ast_odbc_release_obj(obj);
- }
+ ast_odbc_release_obj(obj);
return tableptr;
}
SQLHSTMT ast_odbc_direct_execute(struct odbc_obj *obj, SQLHSTMT (*exec_cb)(struct odbc_obj *obj, void *data), void *data)
{
- int attempt;
SQLHSTMT stmt;
- for (attempt = 0; attempt < 2; attempt++) {
- stmt = exec_cb(obj, data);
-
- if (stmt) {
- break;
- } else if (obj->tx) {
- ast_log(LOG_WARNING, "Failed to execute, but unable to reconnect, as we're transactional.\n");
- break;
- } else if (attempt == 0) {
- ast_log(LOG_WARNING, "SQL Execute error! Verifying connection to %s [%s]...\n", obj->parent->name, obj->parent->dsn);
- }
- if (!ast_odbc_sanity_check(obj)) {
- break;
- }
- }
+ stmt = exec_cb(obj, data);
return stmt;
}
SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
{
- int res = 0, i, attempt;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0;
- unsigned char state[10], diagnostic[256];
+ int res = 0;
SQLHSTMT stmt;
- for (attempt = 0; attempt < 2; attempt++) {
- /* This prepare callback may do more than just prepare -- it may also
- * bind parameters, bind results, etc. The real key, here, is that
- * when we disconnect, all handles become invalid for most databases.
- * We must therefore redo everything when we establish a new
- * connection. */
- stmt = prepare_cb(obj, data);
-
- if (stmt) {
- res = SQLExecute(stmt);
- if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
- if (res == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- }
+ /* This prepare callback may do more than just prepare -- it may also
+ * bind parameters, bind results, etc. The real key, here, is that
+ * when we disconnect, all handles become invalid for most databases.
+ * We must therefore redo everything when we establish a new
+ * connection. */
+ stmt = prepare_cb(obj, data);
+ if (!stmt) {
+ return NULL;
+ }
- if (obj->tx) {
- ast_log(LOG_WARNING, "SQL Execute error, but unable to reconnect, as we're transactional.\n");
- break;
- } else {
- ast_log(LOG_WARNING, "SQL Execute error %d! Verifying connection to %s [%s]...\n", res, obj->parent->name, obj->parent->dsn);
- SQLFreeHandle(SQL_HANDLE_STMT, stmt);
- stmt = NULL;
-
- obj->up = 0;
- /*
- * While this isn't the best way to try to correct an error, this won't automatically
- * fail when the statement handle invalidates.
- */
- if (!ast_odbc_sanity_check(obj)) {
- break;
- }
- continue;
- }
- } else {
- obj->last_used = ast_tvnow();
- }
- break;
- } else if (attempt == 0) {
- ast_odbc_sanity_check(obj);
+ res = SQLExecute(stmt);
+ if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
+ if (res == SQL_ERROR) {
+ ast_odbc_print_errors(SQL_HANDLE_STMT, stmt, "SQL Execute");
}
+
+ ast_log(LOG_WARNING, "SQL Execute error %d!\n", res);
+ SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+ stmt = NULL;
}
return stmt;
int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
{
- int res = 0, i;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0;
- unsigned char state[10], diagnostic[256];
+ int res = 0;
res = SQLExecute(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
if (res == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
+ ast_odbc_print_errors(SQL_HANDLE_STMT, stmt, "SQL Execute");
}
- } else {
- obj->last_used = ast_tvnow();
}
return res;
return res;
}
-int ast_odbc_sanity_check(struct odbc_obj *obj)
+struct ast_str *ast_odbc_print_errors(SQLSMALLINT handle_type, SQLHANDLE handle, const char *operation)
{
- char *test_sql = "select 1";
- SQLHSTMT stmt;
- int res = 0;
-
- if (!ast_strlen_zero(obj->parent->sanitysql))
- test_sql = obj->parent->sanitysql;
-
- if (obj->up) {
- res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
- if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- obj->up = 0;
- } else {
- res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
- if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- obj->up = 0;
- } else {
- res = SQLExecute(stmt);
- if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- obj->up = 0;
- }
- }
+ struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
+ SQLINTEGER nativeerror = 0;
+ SQLINTEGER numfields = 0;
+ SQLSMALLINT diagbytes = 0;
+ SQLSMALLINT i;
+ unsigned char state[10];
+ unsigned char diagnostic[256];
+
+ ast_str_reset(errors);
+ SQLGetDiagField(handle_type, handle, 1, SQL_DIAG_NUMBER, &numfields,
+ SQL_IS_INTEGER, &diagbytes);
+ for (i = 0; i < numfields; i++) {
+ SQLGetDiagRec(handle_type, handle, i + 1, state, &nativeerror,
+ diagnostic, sizeof(diagnostic), &diagbytes);
+ ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
+ ast_log(LOG_WARNING, "%s returned an error: %s: %s\n", operation, state, diagnostic);
+ /* XXX Why is this here? */
+ if (i > 10) {
+ ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
+ break;
}
- SQLFreeHandle (SQL_HANDLE_STMT, stmt);
}
- if (!obj->up && !obj->tx) { /* Try to reconnect! */
- ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
- odbc_obj_disconnect(obj);
- odbc_obj_connect(obj);
- }
- return obj->up;
+ return errors;
+}
+
+unsigned int ast_odbc_class_get_isolation(struct odbc_class *class)
+{
+ return class->isolation;
+}
+
+unsigned int ast_odbc_class_get_forcecommit(struct odbc_class *class)
+{
+ return class->forcecommit;
+}
+
+const char *ast_odbc_class_get_name(struct odbc_class *class)
+{
+ return class->name;
}
static int load_odbc_config(void)
struct ast_variable *v;
char *cat;
const char *dsn, *username, *password, *sanitysql;
- int enabled, pooling, limit, bse, conntimeout, forcecommit, isolation;
+ int enabled, bse, conntimeout, forcecommit, isolation, maxconnections;
struct timeval ncache = { 0, 0 };
- unsigned int idlecheck;
int preconnect = 0, res = 0;
struct ast_flags config_flags = { 0 };
/* Reset all to defaults for each class of odbc connections */
dsn = username = password = sanitysql = NULL;
enabled = 1;
- preconnect = idlecheck = 0;
- pooling = 0;
- limit = 0;
+ preconnect = 0;
bse = 1;
conntimeout = 10;
forcecommit = 0;
isolation = SQL_TXN_READ_COMMITTED;
+ maxconnections = 1;
for (v = ast_variable_browse(config, cat); v; v = v->next) {
- if (!strcasecmp(v->name, "pooling")) {
- if (ast_true(v->value))
- pooling = 1;
- } else if (!strncasecmp(v->name, "share", 5)) {
- /* "shareconnections" is a little clearer in meaning than "pooling" */
- if (ast_false(v->value))
- pooling = 1;
- } else if (!strcasecmp(v->name, "limit")) {
- sscanf(v->value, "%30d", &limit);
- if (ast_true(v->value) && !limit) {
- ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
- limit = 1023;
- } else if (ast_false(v->value)) {
- ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Disabling ODBC class '%s'.\n", v->value, cat);
- enabled = 0;
- break;
- }
- } else if (!strcasecmp(v->name, "idlecheck")) {
- sscanf(v->value, "%30u", &idlecheck);
+ if (!strcasecmp(v->name, "pooling") ||
+ !strncasecmp(v->name, "share", 5) ||
+ !strcasecmp(v->name, "limit") ||
+ !strcasecmp(v->name, "idlecheck")) {
+ ast_log(LOG_WARNING, "The 'pooling', 'shared_connections', 'limit', and 'idlecheck' options were replaced by 'max_connections'. See res_odbc.conf.sample.\n");
} else if (!strcasecmp(v->name, "enabled")) {
enabled = ast_true(v->value);
} else if (!strcasecmp(v->name, "pre-connect")) {
} else if (!strcasecmp(v->name, "forcecommit")) {
forcecommit = ast_true(v->value);
} else if (!strcasecmp(v->name, "isolation")) {
- if ((isolation = text2isolation(v->value)) == 0) {
+ if ((isolation = ast_odbc_text2isolation(v->value)) == 0) {
ast_log(LOG_ERROR, "Unrecognized value for 'isolation': '%s' in section '%s'\n", v->value, cat);
isolation = SQL_TXN_READ_COMMITTED;
}
+ } else if (!strcasecmp(v->name, "max_connections")) {
+ if (sscanf(v->value, "%30d", &maxconnections) != 1 || maxconnections < 1) {
+ ast_log(LOG_WARNING, "max_connections must be a positive integer\n");
+ maxconnections = 1;
+ }
}
}
return res;
}
- new->obj_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr);
-
- if (pooling) {
- new->haspool = pooling;
- if (limit) {
- new->limit = limit;
- } else {
- ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless. Changing limit from 0 to 5.\n");
- new->limit = 5;
- }
- }
-
new->backslash_is_escape = bse ? 1 : 0;
new->forcecommit = forcecommit ? 1 : 0;
new->isolation = isolation;
- new->idlecheck = idlecheck;
new->conntimeout = conntimeout;
new->negative_connection_cache = ncache;
+ new->maxconnections = maxconnections;
if (cat)
ast_copy_string(new->name, cat, sizeof(new->name));
break;
}
+ ast_mutex_init(&new->lock);
+ ast_cond_init(&new->cond, NULL);
+
odbc_register_class(new, preconnect);
ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
ao2_ref(new, -1);
static char *handle_cli_odbc_show(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
- struct ao2_iterator aoi = ao2_iterator_init(class_container, 0);
+ struct ao2_iterator aoi;
struct odbc_class *class;
- struct odbc_obj *current;
int length = 0;
int which = 0;
char *ret = NULL;
if (a->pos != 2)
return NULL;
length = strlen(a->word);
+ aoi = ao2_iterator_init(class_container, 0);
while ((class = ao2_iterator_next(&aoi))) {
if (!strncasecmp(a->word, class->name, length) && ++which > a->n) {
ret = ast_strdup(class->name);
aoi = ao2_iterator_init(class_container, 0);
while ((class = ao2_iterator_next(&aoi))) {
if ((a->argc == 2) || (a->argc == 3 && !strcmp(a->argv[2], "all")) || (!strcmp(a->argv[2], class->name))) {
- int count = 0;
char timestr[80];
struct ast_tm tm;
- ast_localtime(&class->last_negative_connect, &tm, NULL);
- ast_strftime(timestr, sizeof(timestr), "%Y-%m-%d %T", &tm);
ast_cli(a->fd, " Name: %s\n DSN: %s\n", class->name, class->dsn);
- ast_cli(a->fd, " Last connection attempt: %s\n", timestr);
-
- if (class->haspool) {
- struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
-
- ast_cli(a->fd, " Pooled: Yes\n Limit: %d\n Connections in use: %d\n", class->limit, class->count);
-
- while ((current = ao2_iterator_next(&aoi2))) {
- ast_mutex_lock(¤t->lock);
-#ifdef DEBUG_THREADS
- ast_cli(a->fd, " - Connection %d: %s (%s:%d %s)\n", ++count,
- current->used ? "in use" :
- current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected",
- current->file, current->lineno, current->function);
-#else
- ast_cli(a->fd, " - Connection %d: %s\n", ++count,
- current->used ? "in use" :
- current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
-#endif
- ast_mutex_unlock(¤t->lock);
- ao2_ref(current, -1);
- }
- ao2_iterator_destroy(&aoi2);
- } else {
- /* Should only ever be one of these (unless there are transactions) */
- struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
- while ((current = ao2_iterator_next(&aoi2))) {
- ast_cli(a->fd, " Pooled: No\n Connected: %s\n", current->used ? "In use" :
- current->up && ast_odbc_sanity_check(current) ? "Yes" : "No");
- ao2_ref(current, -1);
- }
- ao2_iterator_destroy(&aoi2);
+
+ if (class->last_negative_connect.tv_sec > 0) {
+ ast_localtime(&class->last_negative_connect, &tm, NULL);
+ ast_strftime(timestr, sizeof(timestr), "%Y-%m-%d %T", &tm);
+ ast_cli(a->fd, " Last fail connection attempt: %s\n", timestr);
}
+
+ ast_cli(a->fd, " Number of active connections: %zd (out of %d)\n", class->connection_cnt, class->maxconnections);
ast_cli(a->fd, "\n");
}
ao2_ref(class, -1);
AST_CLI_DEFINE(handle_cli_odbc_show, "List ODBC DSN(s)")
};
-static int odbc_register_class(struct odbc_class *class, int preconnect)
+static void odbc_register_class(struct odbc_class *class, int preconnect)
{
struct odbc_obj *obj;
- if (class) {
- ao2_link(class_container, class);
- /* I still have a reference in the caller, so a deref is NOT missing here. */
-
- if (preconnect) {
- /* Request and release builds a connection */
- obj = ast_odbc_request_obj(class->name, 0);
- if (obj) {
- ast_odbc_release_obj(obj);
- }
- }
- return 0;
- } else {
- ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
- return -1;
- }
-}
-
-static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx)
-{
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0, i;
- unsigned char state[10], diagnostic[256];
-
- ast_debug(2, "odbc_release_obj2(%p) called (obj->txf = %p)\n", obj, obj->txf);
- if (tx) {
- ast_debug(1, "called on a transactional handle with %s\n", tx->forcecommit ? "COMMIT" : "ROLLBACK");
- if (SQLEndTran(SQL_HANDLE_DBC, obj->con, tx->forcecommit ? SQL_COMMIT : SQL_ROLLBACK) == SQL_ERROR) {
- /* Handle possible transaction commit failure */
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
- if (!strcmp((char *)state, "25S02") || !strcmp((char *)state, "08007")) {
- /* These codes mean that a commit failed and a transaction
- * is still active. We must rollback, or things will get
- * very, very weird for anybody using the handle next. */
- SQLEndTran(SQL_HANDLE_DBC, obj->con, SQL_ROLLBACK);
- }
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- }
+ ao2_link(class_container, class);
+ /* I still have a reference in the caller, so a deref is NOT missing here. */
- /* Transaction is done, reset autocommit */
- if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- }
+ if (!preconnect) {
+ return;
}
-#ifdef DEBUG_THREADS
- obj->file[0] = '\0';
- obj->function[0] = '\0';
- obj->lineno = 0;
-#endif
-
- /* For pooled connections, this frees the connection to be
- * reused. For non-pooled connections, it does nothing. */
- obj->used = 0;
- if (obj->txf) {
- /* Prevent recursion -- transaction is already closed out. */
- obj->txf->obj = NULL;
- obj->txf = release_transaction(obj->txf);
+ /* Request and release builds a connection */
+ obj = ast_odbc_request_obj(class->name, 0);
+ if (obj) {
+ ast_odbc_release_obj(obj);
}
- ao2_ref(obj, -1);
+
+ return;
}
void ast_odbc_release_obj(struct odbc_obj *obj)
{
- struct odbc_txn_frame *tx = find_transaction(NULL, obj, NULL, 0);
- odbc_release_obj2(obj, tx);
+ struct odbc_class *class = obj->parent;
+
+ ast_debug(2, "Releasing ODBC handle %p into pool\n", obj);
+
+ /* The odbc_obj only holds a reference to the class when it is
+ * actively being used. This guarantees no circular reference
+ * between odbc_class and odbc_obj. Since it is being released
+ * we also release our class reference. If a reload occurred before
+ * the class will go away automatically once all odbc_obj are
+ * released back.
+ */
+ obj->parent = NULL;
+
+ ast_mutex_lock(&class->lock);
+ AST_LIST_INSERT_HEAD(&class->connections, obj, list);
+ ast_cond_signal(&class->cond);
+ ast_mutex_unlock(&class->lock);
+
+ ao2_ref(class, -1);
}
int ast_odbc_backslash_is_escape(struct odbc_obj *obj)
return obj->parent->backslash_is_escape;
}
-static int commit_exec(struct ast_channel *chan, const char *data)
+static int aoro2_class_cb(void *obj, void *arg, int flags)
{
- struct odbc_txn_frame *tx;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0, i;
- unsigned char state[10], diagnostic[256];
-
- if (ast_strlen_zero(data)) {
- tx = find_transaction(chan, NULL, NULL, 1);
- } else {
- tx = find_transaction(chan, NULL, data, 0);
- }
-
- pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", "OK");
-
- if (tx) {
- if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_COMMIT) == SQL_ERROR) {
- struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
- ast_str_reset(errors);
-
- /* Handle possible transaction commit failure */
- SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
- ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", ast_str_buffer(errors));
- }
+ struct odbc_class *class = obj;
+ char *name = arg;
+ if (!strcmp(class->name, name) && !class->delme) {
+ return CMP_MATCH | CMP_STOP;
}
return 0;
}
-static int rollback_exec(struct ast_channel *chan, const char *data)
+unsigned int ast_odbc_get_max_connections(const char *name)
{
- struct odbc_txn_frame *tx;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0, i;
- unsigned char state[10], diagnostic[256];
+ struct odbc_class *class;
+ unsigned int max_connections;
- if (ast_strlen_zero(data)) {
- tx = find_transaction(chan, NULL, NULL, 1);
- } else {
- tx = find_transaction(chan, NULL, data, 0);
+ class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name);
+ if (!class) {
+ return 0;
}
- pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", "OK");
-
- if (tx) {
- if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_ROLLBACK) == SQL_ERROR) {
- struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
- ast_str_reset(errors);
-
- /* Handle possible transaction commit failure */
- SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
- ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", ast_str_buffer(errors));
- }
- }
- return 0;
+ max_connections = class->maxconnections;
+ ao2_ref(class, -1);
+
+ return max_connections;
}
-static int aoro2_class_cb(void *obj, void *arg, int flags)
+/*
+ * \brief Determine if the connection has died.
+ *
+ * \param connection The connection to check
+ * \param class The ODBC class
+ * \retval 1 Yep, it's dead
+ * \retval 0 It's alive and well
+ */
+static int connection_dead(struct odbc_obj *connection, struct odbc_class *class)
{
- struct odbc_class *class = obj;
- char *name = arg;
- if (!strcmp(class->name, name) && !class->delme) {
- return CMP_MATCH | CMP_STOP;
+ char *test_sql = "select 1";
+ SQLINTEGER dead;
+ SQLRETURN res;
+ SQLHSTMT stmt;
+
+ res = SQLGetConnectAttr(connection->con, SQL_ATTR_CONNECTION_DEAD, &dead, 0, 0);
+ if (SQL_SUCCEEDED(res)) {
+ return dead == SQL_CD_TRUE ? 1 : 0;
}
- return 0;
-}
-#define USE_TX (void *)(long)1
-#define NO_TX (void *)(long)2
-#define EOR_TX (void *)(long)3
+ /* If the Driver doesn't support SQL_ATTR_CONNECTION_DEAD do a
+ * probing query instead
+ */
+ res = SQLAllocHandle(SQL_HANDLE_STMT, connection->con, &stmt);
+ if (!SQL_SUCCEEDED(res)) {
+ return 1;
+ }
-static int aoro2_obj_cb(void *vobj, void *arg, int flags)
-{
- struct odbc_obj *obj = vobj;
- ast_mutex_lock(&obj->lock);
- if ((arg == NO_TX && !obj->tx) || (arg == EOR_TX && !obj->used) || (arg == USE_TX && obj->tx && !obj->used)) {
- obj->used = 1;
- ast_mutex_unlock(&obj->lock);
- return CMP_MATCH | CMP_STOP;
+ if (!ast_strlen_zero(class->sanitysql)) {
+ test_sql = class->sanitysql;
}
- ast_mutex_unlock(&obj->lock);
- return 0;
+
+ res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
+ if (!SQL_SUCCEEDED(res)) {
+ SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+ return 1;
+ }
+
+ res = SQLExecute(stmt);
+ SQLFreeHandle(SQL_HANDLE_STMT, stmt);
+
+ return SQL_SUCCEEDED(res) ? 0 : 1;
}
struct odbc_obj *_ast_odbc_request_obj2(const char *name, struct ast_flags flags, const char *file, const char *function, int lineno)
{
struct odbc_obj *obj = NULL;
struct odbc_class *class;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0, i;
- unsigned char state[10], diagnostic[256];
if (!(class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name))) {
ast_debug(1, "Class '%s' not found!\n", name);
return NULL;
}
- ast_assert(ao2_ref(class, 0) > 1);
+ ast_mutex_lock(&class->lock);
- if (class->haspool) {
- /* Recycle connections before building another */
- obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, EOR_TX);
+ while (!obj) {
+ obj = AST_LIST_REMOVE_HEAD(&class->connections, list);
- if (obj) {
- ast_assert(ao2_ref(obj, 0) > 1);
- }
- if (!obj && (ast_atomic_fetchadd_int(&class->count, +1) < class->limit) &&
- (time(NULL) > class->last_negative_connect.tv_sec + class->negative_connection_cache.tv_sec)) {
- obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
- if (!obj) {
- class->count--;
- ao2_ref(class, -1);
- ast_debug(3, "Unable to allocate object\n");
- ast_atomic_fetchadd_int(&class->count, -1);
- return NULL;
- }
- ast_assert(ao2_ref(obj, 0) == 1);
- ast_mutex_init(&obj->lock);
- /* obj inherits the outstanding reference to class */
- obj->parent = class;
- class = NULL;
- if (odbc_obj_connect(obj) == ODBC_FAIL) {
- ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
- ast_assert(ao2_ref(obj->parent, 0) > 0);
- /* Because it was never within the container, we have to manually decrement the count here */
- ast_atomic_fetchadd_int(&obj->parent->count, -1);
- ao2_ref(obj, -1);
- obj = NULL;
- } else {
- obj->used = 1;
- ao2_link(obj->parent->obj_container, obj);
- }
- } else {
- /* If construction fails due to the limit (or negative timecache), reverse our increment. */
- if (!obj) {
- ast_atomic_fetchadd_int(&class->count, -1);
- }
- /* Object is not constructed, so delete outstanding reference to class. */
- ao2_ref(class, -1);
- class = NULL;
- }
-
- if (obj && ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
- /* Ensure this connection has autocommit turned off. */
- if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SQLSetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- }
- }
- } else if (ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
- /* Non-pooled connections -- but must use a separate connection handle */
- if (!(obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, USE_TX))) {
- ast_debug(1, "Object not found\n");
- obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
- if (!obj) {
- ao2_ref(class, -1);
- ast_debug(3, "Unable to allocate object\n");
- return NULL;
- }
- ast_mutex_init(&obj->lock);
- /* obj inherits the outstanding reference to class */
- obj->parent = class;
- class = NULL;
- if (odbc_obj_connect(obj) == ODBC_FAIL) {
- ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
- ao2_ref(obj, -1);
- obj = NULL;
- } else {
- obj->used = 1;
- ao2_link(obj->parent->obj_container, obj);
- ast_atomic_fetchadd_int(&obj->parent->count, +1);
- }
- }
-
- if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
+ if (!obj) {
+ if (class->connection_cnt < class->maxconnections) {
+ /* If no connection is immediately available establish a new
+ * one if allowed. If we try and fail we give up completely as
+ * we could go into an infinite loop otherwise.
+ */
+ obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
+ if (!obj) {
break;
}
- }
- }
- } else {
- /* Non-pooled connection: multiple modules can use the same connection. */
- if ((obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, NO_TX))) {
- /* Object is not constructed, so delete outstanding reference to class. */
- ast_assert(ao2_ref(class, 0) > 1);
- ao2_ref(class, -1);
- class = NULL;
- } else {
- /* No entry: build one */
- if (!(obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor))) {
- ast_assert(ao2_ref(class, 0) > 1);
- ao2_ref(class, -1);
- ast_debug(3, "Unable to allocate object\n");
- return NULL;
- }
- ast_mutex_init(&obj->lock);
- /* obj inherits the outstanding reference to class */
- obj->parent = class;
- class = NULL;
- if (odbc_obj_connect(obj) == ODBC_FAIL) {
- ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
- ao2_ref(obj, -1);
- obj = NULL;
- } else {
- ao2_link(obj->parent->obj_container, obj);
- ast_assert(ao2_ref(obj, 0) > 1);
- }
- }
- if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
+ obj->parent = ao2_bump(class);
+ if (odbc_obj_connect(obj) == ODBC_FAIL) {
+ ao2_ref(obj->parent, -1);
+ ao2_ref(obj, -1);
+ obj = NULL;
break;
}
- }
- }
- }
- /* Set the isolation property */
- if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)obj->parent->isolation, 0) == SQL_ERROR) {
- SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
+ class->connection_cnt++;
+ ast_debug(2, "Created ODBC handle %p on class '%s', new count is %zd\n", obj,
+ name, class->connection_cnt);
+ } else {
+ /* Otherwise if we're not allowed to create a new one we
+ * wait for another thread to give up the connection they
+ * own.
+ */
+ ast_cond_wait(&class->cond, &class->lock);
}
+ } else if (connection_dead(obj, class)) {
+ /* If the connection is dead try to grab another functional one from the
+ * pool instead of trying to resurrect this one.
+ */
+ ao2_ref(obj, -1);
+ obj = NULL;
+ class->connection_cnt--;
+ ast_debug(2, "ODBC handle %p dead - removing from class '%s', new count is %zd\n",
+ obj, name, class->connection_cnt);
+ } else {
+ /* We successfully grabbed a connection from the pool and all is well!
+ */
+ obj->parent = ao2_bump(class);
+ ast_debug(2, "Reusing ODBC handle %p from class '%s'\n", obj, name);
}
}
- if (obj && ast_test_flag(&flags, RES_ODBC_CONNECTED) && !obj->up) {
- /* Check if this connection qualifies for reconnection, with negative connection cache time */
- if (time(NULL) > obj->parent->last_negative_connect.tv_sec + obj->parent->negative_connection_cache.tv_sec) {
- odbc_obj_connect(obj);
- }
- } else if (obj && ast_test_flag(&flags, RES_ODBC_SANITY_CHECK)) {
- ast_odbc_sanity_check(obj);
- } else if (obj && obj->parent->idlecheck > 0 && ast_tvdiff_sec(ast_tvnow(), obj->last_used) > obj->parent->idlecheck) {
- odbc_obj_connect(obj);
- }
-
-#ifdef DEBUG_THREADS
- if (obj) {
- ast_copy_string(obj->file, file, sizeof(obj->file));
- ast_copy_string(obj->function, function, sizeof(obj->function));
- obj->lineno = lineno;
- }
-#endif
- ast_assert(class == NULL);
+ ast_mutex_unlock(&class->lock);
+ ao2_ref(class, -1);
- if (obj) {
- ast_assert(ao2_ref(obj, 0) > 1);
- }
return obj;
}
struct odbc_obj *_ast_odbc_request_obj(const char *name, int check, const char *file, const char *function, int lineno)
{
struct ast_flags flags = { check ? RES_ODBC_SANITY_CHECK : 0 };
+ /* XXX New flow means that the "check" parameter doesn't do anything. We're requesting
+ * a connection from ODBC. We'll either get a new one, which obviously is already connected, or
+ * we'll get one from the ODBC connection pool. In that case, it will ensure to only give us a
+ * live connection
+ */
return _ast_odbc_request_obj2(name, flags, file, function, lineno);
}
-struct odbc_obj *ast_odbc_retrieve_transaction_obj(struct ast_channel *chan, const char *objname)
-{
- struct ast_datastore *txn_store;
- AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
- struct odbc_txn_frame *txn = NULL;
-
- if (!chan) {
- /* No channel == no transaction */
- return NULL;
- }
-
- ast_channel_lock(chan);
- if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
- oldlist = txn_store->data;
- } else {
- ast_channel_unlock(chan);
- return NULL;
- }
-
- AST_LIST_LOCK(oldlist);
- ast_channel_unlock(chan);
-
- AST_LIST_TRAVERSE(oldlist, txn, list) {
- if (txn->obj && txn->obj->parent && !strcmp(txn->obj->parent->name, objname)) {
- AST_LIST_UNLOCK(oldlist);
- return txn->obj;
- }
- }
- AST_LIST_UNLOCK(oldlist);
- return NULL;
-}
-
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
{
int res;
SQLINTEGER err;
short int mlen;
unsigned char msg[200], state[10];
+ SQLHDBC con;
/* Nothing to disconnect */
if (!obj->con) {
return ODBC_SUCCESS;
}
- ast_mutex_lock(&obj->lock);
-
- res = SQLDisconnect(obj->con);
+ con = obj->con;
+ obj->con = NULL;
+ res = SQLDisconnect(con);
- if (obj->parent) {
- if (res == SQL_SUCCESS || res == SQL_SUCCESS_WITH_INFO) {
- ast_debug(1, "Disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
- } else {
- ast_debug(1, "res_odbc: %s [%s] already disconnected\n", obj->parent->name, obj->parent->dsn);
- }
- }
-
- if ((res = SQLFreeHandle(SQL_HANDLE_DBC, obj->con) == SQL_SUCCESS)) {
- obj->con = NULL;
- ast_debug(1, "Database handle deallocated\n");
+ if ((res = SQLFreeHandle(SQL_HANDLE_DBC, con)) == SQL_SUCCESS) {
+ ast_debug(3, "Database handle %p (connection %p) deallocated\n", obj, con);
} else {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, state, &err, msg, 100, &mlen);
- ast_log(LOG_WARNING, "Unable to deallocate database handle? %d errno=%d %s\n", res, (int)err, msg);
+ SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
+ ast_log(LOG_WARNING, "Unable to deallocate database handle %p? %d errno=%d %s\n", con, res, (int)err, msg);
}
- obj->up = 0;
- ast_mutex_unlock(&obj->lock);
return ODBC_SUCCESS;
}
SQLINTEGER enable = 1;
char *tracefile = "/tmp/odbc.trace";
#endif
- ast_mutex_lock(&obj->lock);
+ SQLHDBC con;
+ long int negative_cache_expiration;
- if (obj->up) {
- odbc_obj_disconnect(obj);
- ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
- } else {
- ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
+ ast_assert(obj->con == NULL);
+ ast_debug(3, "Connecting %s(%p)\n", obj->parent->name, obj);
+
+ /* Dont connect while server is marked as unreachable via negative_connection_cache */
+ negative_cache_expiration = obj->parent->last_negative_connect.tv_sec + obj->parent->negative_connection_cache.tv_sec;
+ if (time(NULL) < negative_cache_expiration) {
+ ast_log(LOG_WARNING, "Not connecting to %s. Negative connection cache for %ld seconds\n", obj->parent->name, negative_cache_expiration - time(NULL));
+ return ODBC_FAIL;
}
- res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
+ res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &con);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
obj->parent->last_negative_connect = ast_tvnow();
- ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
- SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
- SQLSetConnectAttr(obj->con, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
+ SQLSetConnectAttr(con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
+ SQLSetConnectAttr(con, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
#ifdef NEEDTRACE
- SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
- SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
+ SQLSetConnectAttr(con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
+ SQLSetConnectAttr(con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
#endif
- res = SQLConnect(obj->con,
+ res = SQLConnect(con,
(SQLCHAR *) obj->parent->dsn, SQL_NTS,
(SQLCHAR *) obj->parent->username, SQL_NTS,
(SQLCHAR *) obj->parent->password, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
- SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, state, &err, msg, 100, &mlen);
+ SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
obj->parent->last_negative_connect = ast_tvnow();
- ast_mutex_unlock(&obj->lock);
ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
+ if ((res = SQLFreeHandle(SQL_HANDLE_DBC, con)) != SQL_SUCCESS) {
+ SQLGetDiagRec(SQL_HANDLE_DBC, con, 1, state, &err, msg, 100, &mlen);
+ ast_log(LOG_WARNING, "Unable to deallocate database handle %p? %d errno=%d %s\n", con, res, (int)err, msg);
+ }
return ODBC_FAIL;
} else {
- ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->parent->name, obj->parent->dsn);
- obj->up = 1;
- obj->last_used = ast_tvnow();
+ ast_debug(3, "res_odbc: Connected to %s [%s (%p)]\n", obj->parent->name, obj->parent->dsn, obj);
}
- ast_mutex_unlock(&obj->lock);
+ obj->con = con;
return ODBC_SUCCESS;
}
-static int acf_transaction_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
-{
- AST_DECLARE_APP_ARGS(args,
- AST_APP_ARG(property);
- AST_APP_ARG(opt);
- );
- struct odbc_txn_frame *tx;
-
- AST_STANDARD_APP_ARGS(args, data);
- if (strcasecmp(args.property, "transaction") == 0) {
- if ((tx = find_transaction(chan, NULL, NULL, 1))) {
- ast_copy_string(buf, tx->name, len);
- return 0;
- }
- } else if (strcasecmp(args.property, "isolation") == 0) {
- if (!ast_strlen_zero(args.opt)) {
- tx = find_transaction(chan, NULL, args.opt, 0);
- } else {
- tx = find_transaction(chan, NULL, NULL, 1);
- }
- if (tx) {
- ast_copy_string(buf, isolation2text(tx->isolation), len);
- return 0;
- }
- } else if (strcasecmp(args.property, "forcecommit") == 0) {
- if (!ast_strlen_zero(args.opt)) {
- tx = find_transaction(chan, NULL, args.opt, 0);
- } else {
- tx = find_transaction(chan, NULL, NULL, 1);
- }
- if (tx) {
- ast_copy_string(buf, tx->forcecommit ? "1" : "0", len);
- return 0;
- }
- }
- return -1;
-}
-
-static int acf_transaction_write(struct ast_channel *chan, const char *cmd, char *s, const char *value)
-{
- AST_DECLARE_APP_ARGS(args,
- AST_APP_ARG(property);
- AST_APP_ARG(opt);
- );
- struct odbc_txn_frame *tx;
- SQLINTEGER nativeerror=0, numfields=0;
- SQLSMALLINT diagbytes=0, i;
- unsigned char state[10], diagnostic[256];
-
- AST_STANDARD_APP_ARGS(args, s);
- if (strcasecmp(args.property, "transaction") == 0) {
- /* Set active transaction */
- struct odbc_obj *obj;
- if ((tx = find_transaction(chan, NULL, value, 0))) {
- mark_transaction_active(chan, tx);
- } else {
- /* No such transaction, create one */
- struct ast_flags flags = { RES_ODBC_INDEPENDENT_CONNECTION };
- if (ast_strlen_zero(args.opt) || !(obj = ast_odbc_request_obj2(args.opt, flags))) {
- ast_log(LOG_ERROR, "Could not create transaction: invalid database specification '%s'\n", S_OR(args.opt, ""));
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_DB");
- return -1;
- }
- if (!(tx = find_transaction(chan, obj, value, 0))) {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
- return -1;
- }
- obj->tx = 1;
- }
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
- return 0;
- } else if (strcasecmp(args.property, "forcecommit") == 0) {
- /* Set what happens when an uncommitted transaction ends without explicit Commit or Rollback */
- if (ast_strlen_zero(args.opt)) {
- tx = find_transaction(chan, NULL, NULL, 1);
- } else {
- tx = find_transaction(chan, NULL, args.opt, 0);
- }
- if (!tx) {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
- return -1;
- }
- if (ast_true(value)) {
- tx->forcecommit = 1;
- } else if (ast_false(value)) {
- tx->forcecommit = 0;
- } else {
- ast_log(LOG_ERROR, "Invalid value for forcecommit: '%s'\n", S_OR(value, ""));
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
- return -1;
- }
-
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
- return 0;
- } else if (strcasecmp(args.property, "isolation") == 0) {
- /* How do uncommitted transactions affect reads? */
- int isolation = text2isolation(value);
- if (ast_strlen_zero(args.opt)) {
- tx = find_transaction(chan, NULL, NULL, 1);
- } else {
- tx = find_transaction(chan, NULL, args.opt, 0);
- }
- if (!tx) {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
- return -1;
- }
- if (isolation == 0) {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
- ast_log(LOG_ERROR, "Invalid isolation specification: '%s'\n", S_OR(value, ""));
- } else if (SQLSetConnectAttr(tx->obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)isolation, 0) == SQL_ERROR) {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "SQL_ERROR");
- SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
- for (i = 0; i < numfields; i++) {
- SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
- ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
- if (i > 10) {
- ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
- break;
- }
- }
- } else {
- pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
- tx->isolation = isolation;
- }
- return 0;
- } else {
- ast_log(LOG_ERROR, "Unknown property: '%s'\n", args.property);
- return -1;
- }
-}
-
-static struct ast_custom_function odbc_function = {
- .name = "ODBC",
- .read = acf_transaction_read,
- .write = acf_transaction_write,
-};
-
-static const char * const app_commit = "ODBC_Commit";
-static const char * const app_rollback = "ODBC_Rollback";
-
-/*!
- * \internal
- * \brief Implements the channels provider.
- */
-static int data_odbc_provider_handler(const struct ast_data_search *search,
- struct ast_data *root)
-{
- struct ao2_iterator aoi, aoi2;
- struct odbc_class *class;
- struct odbc_obj *current;
- struct ast_data *data_odbc_class, *data_odbc_connections, *data_odbc_connection;
- struct ast_data *enum_node;
- int count;
-
- aoi = ao2_iterator_init(class_container, 0);
- while ((class = ao2_iterator_next(&aoi))) {
- data_odbc_class = ast_data_add_node(root, "class");
- if (!data_odbc_class) {
- ao2_ref(class, -1);
- continue;
- }
-
- ast_data_add_structure(odbc_class, data_odbc_class, class);
-
- if (!ao2_container_count(class->obj_container)) {
- ao2_ref(class, -1);
- continue;
- }
-
- data_odbc_connections = ast_data_add_node(data_odbc_class, "connections");
- if (!data_odbc_connections) {
- ao2_ref(class, -1);
- continue;
- }
-
- ast_data_add_bool(data_odbc_class, "shared", !class->haspool);
- /* isolation */
- enum_node = ast_data_add_node(data_odbc_class, "isolation");
- if (!enum_node) {
- ao2_ref(class, -1);
- continue;
- }
- ast_data_add_int(enum_node, "value", class->isolation);
- ast_data_add_str(enum_node, "text", isolation2text(class->isolation));
-
- count = 0;
- aoi2 = ao2_iterator_init(class->obj_container, 0);
- while ((current = ao2_iterator_next(&aoi2))) {
- data_odbc_connection = ast_data_add_node(data_odbc_connections, "connection");
- if (!data_odbc_connection) {
- ao2_ref(current, -1);
- continue;
- }
-
- ast_mutex_lock(¤t->lock);
- ast_data_add_str(data_odbc_connection, "status", current->used ? "in use" :
- current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
- ast_data_add_bool(data_odbc_connection, "transactional", current->tx);
- ast_mutex_unlock(¤t->lock);
-
- if (class->haspool) {
- ast_data_add_int(data_odbc_connection, "number", ++count);
- }
-
- ao2_ref(current, -1);
- }
- ao2_ref(class, -1);
-
- if (!ast_data_search_match(search, data_odbc_class)) {
- ast_data_remove_node(root, data_odbc_class);
- }
- }
- return 0;
-}
-
-/*!
- * \internal
- * \brief /asterisk/res/odbc/listprovider.
- */
-static const struct ast_data_handler odbc_provider = {
- .version = AST_DATA_HANDLER_VERSION,
- .get = data_odbc_provider_handler
-};
-
-static const struct ast_data_entry odbc_providers[] = {
- AST_DATA_ENTRY("/asterisk/res/odbc", &odbc_provider),
-};
-
static int reload(void)
{
struct odbc_cache_tables *table;
struct odbc_class *class;
- struct odbc_obj *current;
struct ao2_iterator aoi = ao2_iterator_init(class_container, 0);
/* First, mark all to be purged */
load_odbc_config();
- /* Purge remaining classes */
-
- /* Note on how this works; this is a case of circular references, so we
- * explicitly do NOT want to use a callback here (or we wind up in
- * recursive hell).
- *
- * 1. Iterate through all the classes. Note that the classes will currently
- * contain two classes of the same name, one of which is marked delme and
- * will be purged when all remaining objects of the class are released, and
- * the other, which was created above when we re-parsed the config file.
- * 2. On each class, there is a reference held by the master container and
- * a reference held by each connection object. There are two cases for
- * destruction of the class, noted below. However, in all cases, all O-refs
- * (references to objects) will first be freed, which will cause the C-refs
- * (references to classes) to be decremented (but never to 0, because the
- * class container still has a reference).
- * a) If the class has outstanding objects, the C-ref by the class
- * container will then be freed, which leaves only C-refs by any
- * outstanding objects. When the final outstanding object is released
- * (O-refs held by applications and dialplan functions), it will in turn
- * free the final C-ref, causing class destruction.
- * b) If the class has no outstanding objects, when the class container
- * removes the final C-ref, the class will be destroyed.
- */
aoi = ao2_iterator_init(class_container, 0);
- while ((class = ao2_iterator_next(&aoi))) { /* C-ref++ (by iterator) */
+ while ((class = ao2_iterator_next(&aoi))) {
if (class->delme) {
- struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
- while ((current = ao2_iterator_next(&aoi2))) { /* O-ref++ (by iterator) */
- ao2_unlink(class->obj_container, current); /* unlink O-ref from class (reference handled implicitly) */
- ao2_ref(current, -1); /* O-ref-- (by iterator) */
- /* At this point, either
- * a) there's an outstanding O-ref, or
- * b) the object has already been destroyed.
- */
- }
- ao2_iterator_destroy(&aoi2);
- ao2_unlink(class_container, class); /* unlink C-ref from container (reference handled implicitly) */
- /* At this point, either
- * a) there's an outstanding O-ref, which holds an outstanding C-ref, or
- * b) the last remaining C-ref is held by the iterator, which will be
- * destroyed in the next step.
- */
+ ao2_unlink(class_container, class);
}
- ao2_ref(class, -1); /* C-ref-- (by iterator) */
+ ao2_ref(class, -1);
}
ao2_iterator_destroy(&aoi);
return -1;
}
+/*!
+ * \brief Load the module
+ *
+ * Module loading including tests for configuration or dependencies.
+ * This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
+ * or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
+ * tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
+ * configuration file or other non-critical problem return
+ * AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
+ */
static int load_module(void)
{
if (!(class_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr)))
if (load_odbc_config() == -1)
return AST_MODULE_LOAD_DECLINE;
ast_cli_register_multiple(cli_odbc, ARRAY_LEN(cli_odbc));
- ast_data_register_multiple(odbc_providers, ARRAY_LEN(odbc_providers));
- ast_register_application_xml(app_commit, commit_exec);
- ast_register_application_xml(app_rollback, rollback_exec);
- ast_custom_function_register(&odbc_function);
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "ODBC resource",
- .load = load_module,
- .unload = unload_module,
- .reload = reload,
- .load_pri = AST_MODPRI_REALTIME_DEPEND,
- );
+ .support_level = AST_MODULE_SUPPORT_CORE,
+ .load = load_module,
+ .unload = unload_module,
+ .reload = reload,
+ .load_pri = AST_MODPRI_REALTIME_DEPEND,
+);
projects / asterisk/asterisk.git / blobdiff